JP4334736B2 - Endoscopic needle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope injection needle in which a base unit including an inner tube with a needle attached to the distal end is moved forward and backward relative to the outer tube so that the needle protrudes and retracts from the distal end of the outer tube. .
[0002]
[Prior art]
In general, an endoscope injection needle is used for puncturing tissue in a body cavity, but when actually used, the required needle protrusion length depends on the puncture site and the situation of the puncture site (for example, the size of varicose veins). Is required to be changed as appropriate.
[0003]
By the way, the protruding length of the needle is determined by the relative length of the inner and outer tubes. However, by performing sterilization or the like, the length of the inner and outer tubes constituting the endoscope injection needle changes. In order to cope with this, it was necessary to individually adjust the protrusion length of the needle.
[0004]
In order to solve this problem, in Japanese Patent No. 2,695,123 and Japanese Utility Model Publication No. 3-15081, a screw-in type adjusting member is attached to the operation portion attached to the proximal end of the outer tube. By providing and adjusting the adjusting member, the outer tube can be shortened, that is, the protruding length of the needle from the outer tube can be increased.
[0005]
[Problems to be solved by the invention]
In this adjustment method, it is necessary to rotate the screwed member many times to finely adjust the protruding length of the needle, which is a very troublesome operation. Furthermore, in endoscopic treatment, an operator or an assistant must perform various operations, and it is not preferable to add a screwing adjustment operation in addition to these operations.
[0006]
Also, when adjusting the protruding length of the needle protruding from the tip of the outer tube by screwing the screwing member, it is very difficult to see how much the needle length has changed, and the protruding length of the needle each time the screwing member is rotated The adjustment work had to be carried out while checking each time, which was a very cumbersome and time-consuming work.
[0007]
An object of the present invention is to provide an injection needle for an endoscope that can solve the above-mentioned problems and can adjust the protruding amount of the needle accurately and simply.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a first tube, a second tube disposed in the first tube and capable of moving forward and backward in the axial direction with respect to the first tube, and the second tube. A needle body attached to the distal end, a main body attached to the proximal end of the first tube, and a base unit attached to the proximal end of the second tube, the main body and the base unit being relatively movably configured in the axial direction, said said first of said second tube and the tube and operation mechanism which relatively move forward and backward to the axial direction, on one of the body and the base unit A plurality of longitudinal grooves that extend in the axial direction and have different lengths extending in the axial direction due to different positions of the base end or the distal end in the axial direction, and are disposed in the other of the main body and the base unit; Plural Projection and selectively engageable to longitudinal grooves, said longitudinal grooves to each other connects, anda transverse grooves for guiding the protrusion in the longitudinal groove for engaging said protrusion, said protrusion through said transverse groove engagement and guiding the projection into the longitudinal groove of the protrusion selects a vertical groove for engagement with, according to the selected vertical groove in the axial length of the longitudinal groove in which the protrusion is selected by advance and retreat in the axial direction An endoscope injection needle comprising a movement distance adjustment mechanism capable of changing a relative movement distance between the main body and the base unit.
[0009]
According to a second aspect of the present invention, the moving distance adjusting mechanism includes a vertical groove that engages the protrusion through a horizontal groove that connects the vertical grooves by rotating the main body and the base unit relatively around the axis. The endoscope needle according to claim 1, wherein the needle can be selected.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
An endoscope needle according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
[0012]
FIG. 1 is an explanatory view showing the entire endoscope injection needle according to the present embodiment. This endoscope injection needle is made of a nylon tube, etc. The inner / outer diameter of the outer tube 1 is about φ1.7 mm / φ2.4 mm, and the outer tube 1 can be moved back and forth and is made of the same nylon tube. An inner tube 2 having an inner / outer diameter of about φ0.85 mm / φ1.55 mm, and a needle body 3 having a puncture cut end surface with a needle tip attached to the tip of the inner tube 2 at an angle of 30 degrees, The operation part 4 attached to the proximal ends of the inner / outer tubes 1 and 2 is configured as a main member.
[0013]
2 is a longitudinal sectional view of the operation unit 4, FIG. 3 is a transverse sectional view of the portion of the operation unit 4 along the line AA in FIG. 2, and FIG. 4 is a view taken in the direction of arrow B in FIG. FIG. 6 is a plan view of a part of the operation unit 4 as viewed from the direction.
[0014]
The operation portion 4 is melt-bonded to the proximal end of the outer tube 1 and has a substantially cylindrical shape made of the same material as the outer tube 1 and stainless steel at the proximal end of the inner tube 2. An ABS base unit (main body) 8 having a base 7 which is attached via a connecting portion of a pipe 6 and a syringe (not shown) is detachable at the base end, and the main body 5 and the base unit 8 are relative to each other. The needle body 3 protrudes from the tip of the outer tube 1 when the base unit 8 is pushed into the main body 5, and when the base unit 8 is pulled, the needle body 3 becomes the outer tube. 1 is housed in the front end portion. The outer tube 1 and the inner tube 2 are relatively moved forward and backward by the above operation mechanism. 1 and 2 show a state in which the base unit 8 is retracted.
[0015]
A plurality of, for example, four vertical grooves 9 positioned on the upper, lower, left and right sides are provided on the outer wall of the main body member of the base unit 8 along the vertical axis direction. The main body 5 of the operation unit 4 is provided outside a cylindrical portion excluding the portion of the base 7 of the base unit 8 and is slidable in the vertical axis direction. In addition, a round bar-shaped or square bar-shaped projection 13 is provided inwardly at the base end of the inner wall 12 of the cylindrically formed portion of the main body 5, and this projection 13 is the selected longitudinal groove. 9 can be used to slide in the longitudinal axis direction.
[0016]
Further, the projection 13 can slide along the length of the vertical groove 9, and allows the relative movement of the base unit 8 and the main body 5 in the vertical axis direction within that range, and the inner tube 2. A mechanism that adjusts the moving distance is configured, and a mechanism that restricts the relative rotational movement of the base unit 8 and the main body 5 in a state where the protrusion 13 is engaged with the vertical groove 9 is configured.
[0017]
The four vertical grooves 9 have different lengths extending on the base end side, and the four vertical grooves 9 are the longest vertical grooves 9a when the base unit 8 is measured from the base end side. On the other hand, it is shortened by 1 mm, 1 mm and 2 mm in order in the counterclockwise direction. When the protrusion 13 is engaged with the longest vertical groove 9a and the base unit 8 is pushed into the main body 5, the needle body 3 protrudes from the tip of the outer tube 1 as shown in FIG. The protruding length L of 3 is set to 8 mm.
[0018]
In other words, when the vertical grooves 9b, 9c, 9d and the projections 13 that are short by 1 mm, 1 mm, and 2 mm are engaged and pushed into the longest vertical groove 9a, the needle protrusion length in each case is 6 mm, 5mm and 4mm. These correspond to the needle projection lengths of 4 mm, 5 mm, 6 mm, and 8 mm that are usually used for endoscope injection needles, and are configured to be able to cover this length.
[0019]
Further, the difference in length between the longitudinal grooves 9 may be set to 3 mm so as to cope with the increase or decrease of the tube length due to sterilization. The number of longitudinal grooves 9 may be changed from four to six or eight, and the variable amount of the needle protrusion length may be fine.
[0020]
Further, a lateral groove 10 that connects adjacent vertical grooves 9 to each other is provided at the ends of the four vertical grooves 9. A lateral groove mountain-shaped portion 11 is provided at the center of the lateral groove 10. This is because when the base unit 8 is rotated with respect to the main body 5 while the base unit 8 is pulled to the end, the protrusion 13 passes through the lateral groove 10 and gets over the lateral groove mountain-shaped portion 11 while adjacent to it. When switching to the groove 9, a click-like resistance is given so that the protrusion 13 does not return to the original vertical groove 9 after moving to the adjacent vertical groove 9.
[0021]
Further, a vertical groove crest 14 is provided on the bottom surface near the base end of the four vertical grooves 9, and when the base unit 8 is pushed into the main body 5, the protrusion 13 becomes the vertical groove crest 14. The locking means is configured to hold the state where the needle body 3 protrudes.
[0022]
A single mark 15 (for example, a black triangle or ●) is printed or drawn integrally with the main body 5 on the outer periphery of the base end where the protrusion 13 of the main body 5 is located. In addition, in the vertical groove 9 of the base unit 8, distinguished marks 16 [numbers (for example, 1, 2, 3, 4,), characters or other marks] are similarly drawn, and these marks 16 are formed on the main body 5. As long as it is not covered with, you can peek from the outside.
[0023]
Then, by aligning any of the marks 16 of the base unit 8 with the mark (index) 15 of the main body 5, which vertical groove 9 of the four is fitted with the protrusion 13, that is, the protruding length of the needle body 3. It can be seen from the mark 16 how long the length is.
[0024]
Further, a slit 17 is cut out along the vertical axis direction on the upper wall portion of the main body 5 positioned corresponding to the mark 15. For example, the internal state of the main body 5 can be observed through the slit 17.
[0025]
Next, an operation when the endoscope injection needle according to the present embodiment is used will be described. First, as a preparation for use, the base unit 8 is rotated with respect to the main body 5 in a state where the base unit 8 is pulled out, and the vertical groove 9 corresponding to the desired protruding length is selected. Then, the protrusion 13 is fitted into the vertical groove 9. Depending on the length of the selected longitudinal groove 9, a desired protruding length is obtained.
[0026]
In the state shown in FIG. 1 in which the needle 3 is accommodated in the outer tube 1 with the adjusted injection needle, the outer tube 1 is inserted into a forceps channel of an endoscope (not shown) previously inserted into the body cavity. The tip of the outer tube 1 is inserted from the tip of the endoscope.
[0027]
The base unit 8 is pushed into the main body 5 until the projection 13 gets over the vertical groove ridge 14 and is held and fixed in the state shown in FIG. 5 in which the needle body 3 protrudes from the tip of the outer tube 1.
[0028]
In this state, the outer tube 1 protruding from the hand of the endoscopic forceps channel is pushed in, the needle body 3 is punctured into the target tissue, and a drug solution or the like is injected into the tissue with a syringe previously attached to the base 7. Give treatment.
[0029]
In addition, even after the endoscope injection needle is inserted into the endoscope, the protrusion length L of the needle body 3 can be easily changed. That is, the base unit 8 is once pulled with respect to the main body 5, and in this state, the main body 5 and the base unit 8 are rotated to select the vertical groove 9 corresponding to the desired protruding length, and the protrusion 13 is formed in the vertical groove 9. By fitting, a desired protruding length can be obtained. Therefore, it is possible to quickly and easily change the protrusion length L of the needle body 3 while it is inserted into the endoscope for each situation of the lesioned part.
[0030]
As described above, according to the endoscope injection needle according to the present embodiment, when the needle protrusion length L is changed, it can be performed simply by rotating the base unit 8 with respect to the main body 5, which is very simple. And it is possible to change the protrusion length of the needle body 3 by easy operation. Thus, the protrusion length L of the needle body 3 can be changed by a simple and easy operation by the movement distance adjustment mechanism using the operation mechanism that relatively moves the outer tube 1 and the inner tube 2 forward and backward. As a result, even when the endoscope injection needle is inserted into the endoscope, the protruding length L of the needle body 3 can be easily changed according to the state of the lesion. Further, since the needle protrusion length L can be increased or shortened for each fixed amount, there is an advantage that a desired protrusion length L can be easily selected.
[0031]
(Second Embodiment)
An endoscope needle according to a second embodiment of the present invention will be described with reference to FIGS.
[0032]
6 is a longitudinal cross-sectional view of the operation portion of the endoscope injection needle according to the present embodiment, and FIG. 7 is a cross-sectional view of the portion of the operation portion along the line CC in FIG. FIG. 7 is a plan view of a part of the operation unit viewed from the direction of arrow D in FIG. 6.
[0033]
In the present embodiment, a plurality of guide longitudinal grooves 109 (including longitudinal groove mountain portions 114) that regulate the base unit 8 are provided on the inner wall surface of the main body 5 of the operation unit 4 in the vertical and horizontal directions. Each longitudinal groove 109 has a different extension length on the distal end side, and a lateral groove 110 (including a lateral groove mountain-shaped portion 111) that connects the longitudinal grooves 109 is provided on the proximal end side of the longitudinal groove 109. A protrusion 113 that engages with the longitudinal groove 109 is provided on the outer periphery of the tip of the base unit 8.
[0034]
Further, one mark 115 is printed or drawn integrally with the base unit 8 at the tip portion where the projection 113 of the base unit 8 is located, and a plurality of vertical grooves 109 and a circle are formed on the base end outer peripheral portion of the main body 5. A plurality of marks 116 [numbers (for example, 1, 2, 3, 4), characters or marks] each matching in the circumferential direction are similarly drawn, and any mark 116 on the main body 5 is positioned at the mark 115 of the base unit 8. By combining these, it is possible to know which vertical groove 9 of the four has the projection 113, that is, the length of the protruding length of the needle body 3.
[0035]
The above matters are different from the configuration of the first embodiment described above, and other configurations are the same as those of the first embodiment described above. The action and effect of the endoscope injection needle according to this embodiment is the same as that of the first embodiment described above.
[0036]
The present invention is not limited to the above embodiments. According to the above description, the supplementary items listed below and any combination of these items can be obtained.
[0037]
(Supplementary note 1) a first tube;
A second tube disposed within the first tube and capable of advancing and retreating axially relative to the first tube;
A needle attached to the tip of the second tube;
An operation mechanism for relatively moving the first tube and the second tube forward and backward;
Have
The operating mechanism includes a main body attached to the proximal end of the first tube and a base attached to the proximal end of the second tube and configured to be relatively movable in the axial direction with respect to the main body. An endoscope injection needle comprising: a unit, wherein a relative movement distance between the main body and the base unit is variable.
[0038]
(Additional remark 2) The said operation mechanism is attached to the base end of the said 1st tube, and the base end of the said 2nd tube, and is relatively movable to an axial direction with respect to the said main body. The endoscope injection needle according to appendix 1, wherein the endoscope injection needle includes a base unit configured, and a movement distance adjustment mechanism that varies a relative movement distance between the main body and the base unit.
[0039]
(Supplementary Note 3) The moving distance adjusting mechanism is disposed in one of the main body and the base unit, and is disposed in the other of the main body and the base unit, and a plurality of vertical grooves having different lengths extending in the axial direction. A protrusion that selectively engages with the longitudinal groove, and the protrusion moves forward and backward in the longitudinal groove to change a relative movement distance between the main body and the base unit. The endoscope injection needle according to appendix 1.
[0040]
(Supplementary note 4) In the supplementary note 3, the plurality of vertical grooves have different lengths due to different positions of the proximal end portion or the distal end portion.
[0041]
(Additional remark 5) In the said additional remark 3, in order to select the vertical groove which the said protrusion engages, the said several vertical groove has a means which a protrusion can move between adjacent vertical grooves.
[0042]
(Additional remark 6) In the said additional remark 5, the means which the said protrusion can move is a horizontal groove which connects adjacent vertical grooves.
[0043]
(Additional remark 7) In the said additional remark 6, the said horizontal groove is formed shallower than a some vertical groove.
[0044]
(Additional remark 8) In the said additional remark 7, the said horizontal groove has a level | step difference in part.
[0045]
(Supplementary note 9) In any one of Supplementary note 7 and Supplementary note 8, by rotating the main body and the base unit relatively, the protrusion moves between adjacent vertical grooves, and the protrusion is a vertical groove during the movement. Get over the shallow groove formed shallower.
[0046]
(Supplementary Note 10) In any one of Supplementary Notes 5 to 9, the plurality of vertical grooves are provided on the base unit, and the protrusions are provided on the main body, and are provided on a distal end side of the horizontal groove.
[0047]
(Supplementary note 11) In any one of the supplementary notes 5 to 9, the plurality of vertical grooves are provided in the main body, the projections are provided in the base unit, and the lateral grooves are provided on a base end side of the vertical grooves. It has been.
[0048]
(Supplementary note 12) In any one of the supplementary notes 3 to 11, a fixing means for fixing the base unit in a state where the base unit is pushed into the main body is provided.
[0049]
【The invention's effect】
As described above, according to the endoscope injection needle of the present invention, the needle protrusion length can be adjusted easily and quickly with a simple operation.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing the whole of an endoscope injection needle according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of an operation unit of the endoscope injection needle.
FIG. 3 is a cross-sectional view of a portion of the operation unit taken along line AA in FIG. 2;
4 is a plan view of the operation unit as seen from the direction of arrow B in FIG. 2. FIG.
FIG. 5 is a longitudinal sectional view of an operation unit of the endoscope injection needle.
FIG. 6 is a longitudinal sectional view of an operation unit of an endoscope injection needle according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view of a portion of the operation unit taken along line CC in FIG.
FIG. 8 is a plan view of the operation unit viewed from the direction of arrow D in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Outer tube, 2 ... Inner tube, 3 ... Needle body, 4 ... Operation part,
5 ... Main body, 8 ... Base unit (main body), 9 ... Vertical groove, 10 ... Horizontal groove,
11 ... Horizontal groove mountain-shaped portion, 13 ... Projection, 14 ... Vertical groove mountain-shaped portion,

Claims (2)

A first tube;
A second tube disposed within the first tube and capable of advancing and retreating axially relative to the first tube;
A needle attached to the tip of the second tube;
A main body attached to the base end of the first tube; and a base unit attached to the base end of the second tube, the main body and the base unit being relatively movable in the axial direction. An operating mechanism configured to relatively advance and retreat the first tube and the second tube in the axial direction;
A plurality of longitudinal grooves that are arranged to extend along the axial direction in any one of the main body and the base unit and have different lengths extending in the axial direction due to different positions of the proximal end or the distal end in the axial direction; A protrusion disposed on the other of the main body and the base unit and selectively engageable with the plurality of vertical grooves , and a horizontal groove for connecting the vertical grooves to each other and guiding the protrusions to the vertical grooves engaging the protrusions If has the projection to guide the projection into the longitudinal groove for engaging through the transverse grooves select the flutes the projection engages, forward and backward the selected longitudinal groove said projection is axially A movement distance adjustment mechanism capable of changing the relative movement distance between the main body and the base unit according to the axial length of the longitudinal groove selected by
An endoscope needle for use with an endoscope. The moving distance adjusting mechanism is capable of selecting a vertical groove that engages the protrusion through a horizontal groove that connects the vertical grooves by rotating the main body and the base unit relatively around the axis. The endoscope needle according to claim 1.

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